/*
 * TeleStax, Open Source Cloud Communications  Copyright 2012.
 * and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.mobicents.protocols.ss7.map.service.callhandling;

import java.io.IOException;
import org.mobicents.protocols.asn.AsnException;
import org.mobicents.protocols.asn.AsnInputStream;
import org.mobicents.protocols.asn.AsnOutputStream;
import org.mobicents.protocols.asn.BitSetStrictLength;
import org.mobicents.protocols.asn.Tag;
import org.mobicents.protocols.ss7.map.api.MAPException;
import org.mobicents.protocols.ss7.map.api.MAPParsingComponentException;
import org.mobicents.protocols.ss7.map.api.MAPParsingComponentExceptionReason;
import org.mobicents.protocols.ss7.map.api.service.callhandling.AllowedServices;
import org.mobicents.protocols.ss7.map.primitives.MAPAsnPrimitive;

/*
 * 
 * @author cristian veliscu
 * 
 */
public class AllowedServicesImpl implements AllowedServices, MAPAsnPrimitive {
	private static final int _INDEX_FirstServiceAllowed = 0;
	private static final int _INDEX_SecondServiceAllowed = 1;
	
	private static final String _PrimitiveName = "AllowedServices";

	private BitSetStrictLength bitString = new BitSetStrictLength(2);

	/**
	 * 
	 */
	public AllowedServicesImpl() {
	}

	public AllowedServicesImpl(boolean suppressCUG, boolean suppressCCBS) {
		if (suppressCUG)
			this.bitString.set(_INDEX_FirstServiceAllowed);
		if (suppressCCBS)
			this.bitString.set(_INDEX_SecondServiceAllowed);
	}

	@Override
	public boolean getFirstServiceAllowed() {
		return this.bitString.get(_INDEX_FirstServiceAllowed);
	}
	
	@Override
	public boolean getSecondServiceAllowed() {
		return this.bitString.get(_INDEX_SecondServiceAllowed);
	}

	@Override
	public int getTag() throws MAPException {
		return Tag.STRING_BIT;
	}

	@Override
	public int getTagClass() {
		return Tag.CLASS_UNIVERSAL;
	}

	@Override
	public boolean getIsPrimitive() {
		return true;
	}

	@Override
	public void decodeAll(AsnInputStream ansIS) throws MAPParsingComponentException {
		try {
			int length = ansIS.readLength();
			this._decode(ansIS, length);
		} catch (IOException e) {
			throw new MAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + 
					 e.getMessage(), e, MAPParsingComponentExceptionReason.MistypedParameter);
		} catch (AsnException e) {
			throw new MAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + 
					 e.getMessage(), e, MAPParsingComponentExceptionReason.MistypedParameter);
		}
	}

	@Override
	public void decodeData(AsnInputStream ansIS, int length) throws MAPParsingComponentException {
		try {
			this._decode(ansIS, length);
		} catch (IOException e) {
			throw new MAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + 
					 e.getMessage(), e, MAPParsingComponentExceptionReason.MistypedParameter);
		} catch (AsnException e) {
			throw new MAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + 
					 e.getMessage(), e, MAPParsingComponentExceptionReason.MistypedParameter);
		}
	}
	
	private void _decode(AsnInputStream ansIS, int length) throws MAPParsingComponentException, IOException, AsnException {
		if ((length < 1) || (length > 2))
			throw new MAPParsingComponentException("Error decoding " + _PrimitiveName + ": " + 
					"the SuppressMTSS field must contain from 1 or 2 octets. Contains: " + length,
					MAPParsingComponentExceptionReason.MistypedParameter);
		
		this.bitString = ansIS.readBitStringData(length);
	}
	
	@Override
	public void encodeAll(AsnOutputStream asnOs) throws MAPException {
		this.encodeAll(asnOs, Tag.CLASS_UNIVERSAL, Tag.STRING_BIT);
	}

	@Override
	public void encodeAll(AsnOutputStream asnOs, int tagClass, int tag) throws MAPException {
		try {
			asnOs.writeTag(tagClass, true, tag);
			int pos = asnOs.StartContentDefiniteLength();
			this.encodeData(asnOs);
			asnOs.FinalizeContent(pos);
		} catch (AsnException e) {
			throw new MAPException("AsnException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
		}
	}

	@Override
	public void encodeData(AsnOutputStream asnOs) throws MAPException {
		try {
			asnOs.writeBitStringData(this.bitString);
		} catch (IOException e) {
			throw new MAPException("IOException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
		} catch (AsnException e) {
			throw new MAPException("AsnException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
		}
	}

	@Override
	public String toString() {
		StringBuilder sb = new StringBuilder();
		sb.append(_PrimitiveName);
		sb.append(" [");

		if (getFirstServiceAllowed())
			sb.append("FirstServiceAllowed, ");
		if (getSecondServiceAllowed())
			sb.append("SecondServiceAllowed, ");

		sb.append("]");
		return sb.toString();
	}
}

